An Efficient Weight-based OVSF Code Assignment Strategy for WCDMA

• Main Authors: Cheng-Kai Tseng, 曾正凱
• Other Authors: Chyi-Ren Dow
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/95787137075009748819

碩士 === 逢甲大學 === 資訊工程所 === 92 === Technological advances and rapid development in handheld wireless terminals have facilitated the rapid growth of wireless communications. Since the interference problem exists in a Wideband Code Division Multiple Access (WCDMA) system, resource allocation becomes very important for the improvement of system performance. This work presents a weight-based OVSF code assignment scheme for large-scale wireless mobile networks. The scheme takes advantage of the reuse patterns of primary and secondary codes to improve the call allocation performance. Under the orthogonal code limitation, a weight function is designed for the process of code selection to improve code assignment for multi-cell systems. Both the intra-cell and inter-cell models contribute to the weight values that are record in the interference table. The experimental results demonstrate that our weight-based code assignment strategy is more efficient than other schemes in terms of the code blocking and primary code utilization rates.